The Question:

Who is the Phillips head screwdriver named after? Is there
really a Phillips?

The Answer:

There really is a Phillips! Henry F. Phillips, of Portland, OR,
invented the X-shaped socket head screw for car makers who needed a
screw that could be driven with more torque and that would hold more
tightly than slotted screws. Car makers also needed a screw that would
center quickly and easily, and could be used efficiently on an
assembly line.

The invention was initially rejected, but eventually accepted by
the American Screw Co., who in 1936 persuaded General Motors to use
the Phillips head screw in manufacturing Cadillacs.